T491C474K050AS Equivalent & Substitute Parts

Part Overview

The T491C474K050AS is a 0.47 µF molded tantalum capacitor manufactured by KEMET, rated for 50 V operation in a 2312 (6032 Metric) surface mount package. This component is classified as obsolete, indicating it has been discontinued by the manufacturer. Finding equivalent substitute parts is necessary to support ongoing production, maintenance, and repair applications where this capacitor specification is required.

Substiute Parts

T491C474K050AS

KEMETIn Stock: 712T491C474K050AS Datasheet

Current PartRFQ

T491C474K050AT

KEMETIn Stock: 1716T491C474K050AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491C474K050AS is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 0.47 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating: 50 V (exact match required)
• Type: Molded Tantalum (exact match required)
• ESR: 8 Ohm (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• Package / Case: 2312 (6032 Metric) (exact match required)
• Physical Dimensions: 0.236" L x 0.126" W, Height 0.110" max (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

The T491C474K050AT qualifies as a direct substitute based on identical electrical and mechanical specifications. The primary difference is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The T491C474K050AT is the direct substitute for the obsolete T491C474K050AS. Selection of the substitute is based on the following engineering factors:

Product Status: The T491C474K050AS is obsolete and no longer manufactured. The T491C474K050AT is active and currently in production, ensuring long-term availability and supply chain continuity.

Electrical Equivalence: Both parts share identical electrical specifications: 0.47 µF capacitance, ±10% tolerance, 50 V rating, 8 Ohm ESR, and -55°C to 125°C operating temperature range. These parameters ensure functional interchangeability in circuit applications.

Mechanical Compatibility: Both parts use the 2312 (6032 Metric) surface mount package with identical physical dimensions and height specifications, enabling direct PCB footprint compatibility without layout modifications.

Compliance Status: The T491C474K050AT is ROHS3 compliant, whereas the T491C474K050AS is RoHS non-compliant. For applications subject to RoHS regulations, the substitute part satisfies compliance requirements.

Packaging Consideration: The substitute is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. If bulk packaging is required, contact the manufacturer for alternative packaging options.

Frequently Asked Questions (FAQ)

Q: Can the T491C474K050AT be used as a direct replacement for the T491C474K050AS?

A: Yes. The T491C474K050AT is a direct substitute. Both parts have identical electrical specifications (0.47 µF, ±10%, 50 V, 8 Ohm ESR) and mechanical dimensions (2312 package, 6.00mm x 3.20mm x 2.80mm max height). They are functionally interchangeable in all circuit applications.

Q: What is the primary difference between these two parts?

A: The main differences are product status and compliance. The T491C474K050AS is obsolete, while the T491C474K050AT is active and in production. Additionally, the T491C474K050AT is ROHS3 compliant, whereas the T491C474K050AS is RoHS non-compliant.

Q: Are there any PCB layout changes required when switching from T491C474K050AS to T491C474K050AT?

A: No. Both parts use the identical 2312 (6032 Metric) surface mount package with the same physical dimensions and footprint. No PCB modifications are necessary.

Q: What is the packaging format of the substitute part?

A: The T491C474K050AT is supplied in Tape & Reel (TR) format, which is standard for high-volume automated assembly. The original T491C474K050AS was supplied in bulk packaging.

Q: Does the substitute part have a specified lifetime rating?

A: Yes. The T491C474K050AT has a lifetime rating of 2000 hours at 125°C. The original part did not specify a lifetime rating in the available documentation.

Q: Are both parts suitable for the full operating temperature range of -55°C to 125°C?

A: Yes. Both the T491C474K050AS and T491C474K050AT are rated for operation across the full -55°C to 125°C temperature range.

Q: What is the Moisture Sensitivity Level (MSL) for these capacitors?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply.